Charred leeks with leek ash crème fraîche, burnt citrus dressing and soft egg

This vegetarian barbecue recipe uses up the often discarded green ends of the leeks by burning them to a crisp and blitzing into a 'leek ash'. Though it may sound a bit unusual, the deep, smoky, oniony flavour of the powder is surprisingly complex and almost tastes like dark cocoa powder. It takes no time at all, keeps indefinitely and helps combat food waste! Try using the leftover ash folded through mayonnaise or as a steak seasoning.